In a moment captured on camera, the man, dressed in camouflage, approached the former House Speaker in a grocery store and told him to his face, “You know something? You’re a f–king asshole.”

Though audio of the exchange is slightly muffled, Gingrich seems to answer, “No I am not!”

“Yes,” the man said.

“It’s a free country,” Gingrich is heard saying as the clip ends.

The exchange was reported on CNN during “The Situation Room with Wolf Blitzer.” Watch below:

A d v e r t i s e m e n t

Gingrich, who surged to the front of the GOP pack in the last month, has seen his poll numbers in Iowa begin to slide just two weeks out from the caucuses. He also lost out on the endorsements of two major social conservative leaders: Bob Vander Plaats, head of the Christian group Family Leader, and Iowa Family Policy Center head Chuck Hurley both backed former Pennsylvania Sen. Rick Santorum Tuesday.